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(Topic ID: 271665)

cpu 89 schematics wrong?

By Rdeyo57

3 years ago



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  • Latest reply 3 years ago by schudel5
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    #1 3 years ago
    OP
     
    RJD

    Rdeyo57

    Pinside member

    10y 31,150 33

    Hi can someone tell me if they know if the schematics is wrong on a cpu89 schematics ? As I read it, it shows J208-8 Dir SW 8 goes to D14 but when I ohm it, it goes to D13?

    I also don't get why it shows the J 208 plug is keyed 9 and 10 on prints but in reality the plug is keyed at pin 5?

    the board is A-12742-20017
    I have ohmed this out on 3 boards one is a Twobits board all the same results...………... what am I missing?

    Thanks

    20200624_192617 (resized).jpg20200624_192617 (resized).jpg
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    #2 3 years ago
     
    MJS

    schudel5

    Pinside member

    20y 166K 6,395 27

    Probably an error. Almost every schematic has an error or two in them I've found over the years.

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